LX8385 Microsemi Corporation, LX8385 Datasheet

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LX8385

Manufacturer Part Number
LX8385
Description
3 A Low Dropout Positive Regulators
Manufacturer
Microsemi Corporation
Datasheet

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Copyright © 2000
Rev. 2.0b, 2005-10-25
positive regulators designed to provide 3A
output current. These regulators yield
higher efficiency than currently available
devices with all internal circuitry designed
to operate down to a 1V input-to-output
differential. In each of these products, the
dropout voltage is fully specified as a
function of load current. Dropout is
guaranteed
(8385A/B) and 1.5V (8385) at maximum
output current, decreasing at lower load
currents.
reference voltage tolerance to 1% maximum
at room temperature and 2% maximum over
the 0 to 125°C range for the LX8385A. The
LX8385B offers 0.8% tolerance at room
temperature and 1.0% maximum over line,
load and temperature. Fixed versions are
also available and specified in the Available
Options table below.
IMPORTANT: For the most current data, consult MICROSEMI’s website:
The LX8385/85A/85B Series ICs are
In addition, on-chip trimming adjusts the
*1500µF
6MV1500GX
Sanyo
5V
TM
-25 to 125
0 to 125
T
+
A
at
(°C)
IN
a
maximum
Accuracy
Max Ref
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LX8385A
2.0%
2.0%
1.0%
2.0%
P R O D U C T H I G H L I G H T
ADJ
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8385-xxCP-TR)
D E S C R I P T I O N
of
Max Dropout
1.3V
Voltage
1.5V
1.3V
1.3V
1.5V
pin-compatible
regulators, such as the 117 series products,
but they do require input and output
capacitors. A minimum 10µF capacitor is
required on the input and a 15µF or greater
on the output of these new devices for
stability. Although, these capacitors are
generally included in most regulator designs.
current flows into the load, thereby
increasing efficiency. This feature contrasts
with PNP regulators where up to 10% of the
output current is wasted as quiescent
current.
industrial temperature range of -25°C to
125°C, while the LX8385-xxC / 85A-xxC /
85B-xxC is specified over the commercial
range of 0°C to 125°C.
The LX8385/85A/85B Series devices are
The LX8385/85A/85B Series quiescent
The LX8385-xxI is specified over the
OUT
Integrated Products Division
DT
PACKAGE ORDER INFO
121
Microsemi Inc.
200
LX8385A-xxCDT
LX8385B-xxCDT
1%
1%
Transition DC: 0532
LX8385-xxCDT
LX8385-xxIDT
®
RoHS Compliant
Ω
Ω
http://www.microsemi.com
(D-Pak) 3-Pin
Plastic TO-252
with
+
at 3A
3.3V
earlier
1500µF
2x 6MV1500GX
Sanyo
3A Low Dropout Positive Regulators
3-terminal
P
Transition DC: 0543
LX8385A-xxCP
LX8385B-xxCP
P
LX8385-xxCP
RoHS Compliant
LX8385-xxIP
RODUCTION
Plastic TO-220
3-Pin
Table 1 - Available Options
LX8385/85A/85B-00
LX8385/85A/85B-33
LX8385/85A/85B-05
High Efficiency Linear
Post Regulators For Switching
Battery Chargers
Constant Current Regulators
Graphics & Standard Supplies
Processor I/O Supply
Low Voltage Memory & Chipset
Three-Terminal Adjustable Or
Fixed Output
Guaranteed 1% Voltage
Reference Accuracy Over Line,
Load, And Temperature
(LX8385B)
Guaranteed < 1.5V Headroom At
3A (LX8385)
Guaranteed < 1.3V Headroom At
3A (LX8385A/8385B)
0.015% Line Regulation
0.15% Load Regulation
Regulators
Power Supplies
Supplies
P A R T #
D
ATA
K E Y F E A T U R E S
A P P L I C A T I O N S
DD
S
LX8385A-xxCDD
LX8385B-xxCDD
Transition DC: 0535
LX8385-xxCDD
HEET
LX8385-xxIDD
RoHS Compliant
Plastic TO-263
3-Pin
V O L T A G E
LX8385x-xx
O U T P U T
Adjustable
3.3V
5.0V
Page 1

Related parts for LX8385

LX8385 Summary of contents

Page 1

... Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8385-xxCP-TR) Copyright © 2000 Rev. 2.0b, 2005-10-25 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® 3A Low Dropout Positive Regulators The LX8385/85A/85B Series devices are ...

Page 2

... T 2.7°C θ Therm al Bandgap Control Circuit Circuit Microsemi Inc. Integrated Products Division LX8385x- RODUCTION ATA HEET TAB is V OUT OUT ADJ / 1 GND ...

Page 3

... TM Unless otherwise specified, the following specifications apply over the operating ambient temperature for the LX8385x-xxC with ≤ ≤ 0°C T 125°C and the LX8385-xxI with -25° 3A. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient OUT temperature ...

Page 4

... Unless otherwise specified, the following specifications apply over the operating ambient temperature for the LX8385x-xxC with ≤ ≤ 0°C T 125°C and the LX8385-xxI with -25°C ...

Page 5

... TM The LX8385/85A/85B Series ICs are easy to use Low- Dropout (LDO) voltage regulators. They have all of the standard self-protection features expected of a voltage regulator: short circuit protection, safe operating area protection and automatic thermal shutdown if the device temperature rises above approximately 165°C. ...

Page 6

... OUTPUT VOLTAGE The LX8385/85A/85B ICs develop a 1.25V reference voltage between the output and the adjust terminal (See Figure 2). By placing a resistor, R1, between these two terminals, a constant current is caused to flow through R1 and down through R2 to set the overall output voltage ...

Page 7

... DROPOUT(MAX) installed regulator. THERMAL CONSIDERATIONS The LX8385/85A/85B regulators have internal power and thermal limiting circuitry designed to protect each device under overload conditions. For continuous normal load conditions, however, maximum junction temperature ratings must not be exceeded ...

Page 8

... Alum inum capacitor. May ADJ be increased without lim it. ESR m ust be less than <400m FIGURE 7 - FIXED 3.3V OUTPUT REGULATOR + ) V DROPOUT(MA X) Microsemi Inc. Integrated Products Division LX8385x- RODUCTION ATA HEET IN OUT LX8385x R1 121 Ω 1% ADJ + R2 1k ⎛ ⎞ R2 ⎜ ⎟ 1.25V 1 + ⎝ ⎠ 121 Ω ...

Page 9

... Dim Seating Plane Microsemi Inc. Integrated Products Division LX8385x- RODUCTION ATA HEET M I ILLIMETERS NCHES MIN MAX MIN MAX 14.22 15.88 0.560 0.625 9.65 10.67 0.380 0.420 3.56 4.83 0.140 0.190 0.51 1.14 0.020 0.045 3 ...

Page 10

... 0. Microsemi Inc. Integrated Products Division LX8385x- RODUCTION ATA HEET M I ILLIMETERS NCHES MIN MAX MIN MAX 6.47 6.73 0.255 0.265 5.97 6.23 0.235 0.245 2.16 2.42 0.085 0.095 0.68 0.94 0.027 0.037 0.38 0.64 0.015 ...

Page 11

... Copyright © 2000 Rev. 2.0b, 2005-10-25 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® 3A Low Dropout Positive Regulators P RODUCTION Microsemi Inc. Integrated Products Division LX8385x- ATA HEET Page 11 ...

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